Master Chronometer Co-Axial...Dark Side.... Glass case back....Ceramic Titanium? like the Seamaster Planet Ocean 600M....So expect a high price point....
I would expect a 42 mm case, but you never know. Omega must consider it a substantial release with all the time given in shuffling guests around from hotel to venue, eating, presentation, etc. Not just a simple release.
Probably Apollo 8 (21. Dec. 1968 – 27. Dec. 1968)
On the first image it looks like there's written «APOLLO ... DEC».
Apollo 17 was in December as well (1972)
I was told at the OB in London that the current Apollo 8 is coming to an end this year, probably in Q1.
I'm surprised it lasted as long as it has, it was released in 2018 for the 50th anniversary of Apollo 8 so it's time to replace it. Only the Apollo 8 and 321 movements were non coaxial. The 321 is a special project so it can be excused, but the Apollo 8 movement was well past its use by date.